Analysis

  • max time kernel
    93s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-12-2024 20:37

General

  • Target

    bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe

  • Size

    659KB

  • MD5

    ab8a662f79dc7c506f78d9fffbb07cb0

  • SHA1

    07ed591ddc463cc8c2bb89cb8175274ba82cd8f0

  • SHA256

    bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87c

  • SHA512

    9c168be8e0e63d78d3daff34d5e2f2b217a6c5aa563f4f503bcc2b437e0f0a0448edb7bbed814d9f0617632f0f2027c48c724d83ec608bd2189d58186ed8c68e

  • SSDEEP

    12288:VmgqnIZuYfCYqFet4CovkM7VyynE0zxH03pyaWmjwTXjKzVW:VWnIZuMCxezot7AGpZQ9872RW

Malware Config

Signatures

  • Detect Neshta payload 4 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Neshta family
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe
    "C:\Users\Admin\AppData\Local\Temp\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe"
    1⤵
    • Checks computer location settings
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4280
    • C:\Users\Admin\AppData\Local\Temp\3582-490\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1760
      • C:\Windows\Temp\{C890055D-39AE-47ED-8A68-BBF435C02C19}\.cr\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe
        "C:\Windows\Temp\{C890055D-39AE-47ED-8A68-BBF435C02C19}\.cr\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\3582-490\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe" -burn.filehandle.attached=688 -burn.filehandle.self=692
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2304

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE

    Filesize

    86KB

    MD5

    3b73078a714bf61d1c19ebc3afc0e454

    SHA1

    9abeabd74613a2f533e2244c9ee6f967188e4e7e

    SHA256

    ded54d1fcca07b6bff2bc3b9a1131eac29ff1f836e5d7a7c5c325ec5abe96e29

    SHA512

    75959d4e8a7649c3268b551a2a378e6d27c0bfb03d2422ebeeb67b0a3f78c079473214057518930f2d72773ce79b106fd2d78405e8e3d8883459dcbb49c163c4

  • C:\Users\Admin\AppData\Local\Temp\3582-490\bf656afc0543356c4ca202cf7f4f6518b7e646b70e35b95b57d529976971b87cN.exe

    Filesize

    618KB

    MD5

    1f472cf10cbc3a5a849c4d4f18115b96

    SHA1

    a5020688a3a33dbde0b494e592f30de7d2d4eb43

    SHA256

    4b281ea9766b9d17e2ea43736797d4e3d4da4d102bbd9b11cf27167f0f65a26c

    SHA512

    410e550d593b3cbec9f2276d539958c86d2e31ef8132dd34a522b41e5ef7bbed40fc18fdb361fa9d40645cd0419a8fed6581936384df15185b3b7ad595374634

  • C:\Windows\Temp\{2BCCAD73-5623-4660-AF10-8E4B44FFC4AB}\.ba\logo.png

    Filesize

    12KB

    MD5

    84709eb22e4b05688067699ca9b0d322

    SHA1

    7c3381d8b6a58087cda95577cc2d25e7aa2c21d8

    SHA256

    c8e23a42e04fbd73f5f66f3b9f2ba34a777bc4769c413a0f78335a4e757baad5

    SHA512

    04de70b7317ee1cbde73ac0fe84bd70983cf0ff7e769e5f9626c69eaa6e3e9724c95b14ccb7a5478ee639848d3f8c98e4dec599cc5e33ad71de638da589ba319

  • C:\Windows\Temp\{2BCCAD73-5623-4660-AF10-8E4B44FFC4AB}\.ba\wixstdba.dll

    Filesize

    215KB

    MD5

    f68f43f809840328f4e993a54b0d5e62

    SHA1

    01da48ce6c81df4835b4c2eca7e1d447be893d39

    SHA256

    e921f69b9fb4b5ad4691809d06896c5f1d655ab75e0ce94a372319c243c56d4e

    SHA512

    a7a799ecf1784fb5e8cd7191bf78b510ff5b07db07363388d7b32ed21f4fddc09e34d1160113395f728c0f4e57d13768a0350dbdb207d9224337d2153dc791e1

  • memory/4280-128-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/4280-149-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/4280-151-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB